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rf_callback.c revision 1.5 
      1 /*	$NetBSD: rf_callback.c,v 1.5 2001/10/04 15:58:51 oster Exp $	*/
      2 /*
      3  * Copyright (c) 1995 Carnegie-Mellon University.
      4  * All rights reserved.
      5  *
      6  * Author: Jim Zelenka
      7  *
      8  * Permission to use, copy, modify and distribute this software and
      9  * its documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     16  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie the
     26  * rights to redistribute these changes.
     27  */
     28 
     29 /*****************************************************************************************
     30  *
     31  * callback.c -- code to manipulate callback descriptor
     32  *
     33  ****************************************************************************************/
     34 
     35 
     36 #include <dev/raidframe/raidframevar.h>
     37 
     38 #include "rf_archs.h"
     39 #include "rf_threadstuff.h"
     40 #include "rf_callback.h"
     41 #include "rf_debugMem.h"
     42 #include "rf_freelist.h"
     43 #include "rf_shutdown.h"
     44 
     45 static RF_FreeList_t *rf_callback_freelist;
     46 
     47 #define RF_MAX_FREE_CALLBACK 64
     48 #define RF_CALLBACK_INC       4
     49 #define RF_CALLBACK_INITIAL   4
     50 
     51 static void rf_ShutdownCallback(void *);
     52 static void
     53 rf_ShutdownCallback(ignored)
     54 	void   *ignored;
     55 {
     56 	RF_FREELIST_DESTROY(rf_callback_freelist, next, (RF_CallbackDesc_t *));
     57 }
     58 
     59 int
     60 rf_ConfigureCallback(listp)
     61 	RF_ShutdownList_t **listp;
     62 {
     63 	int     rc;
     64 
     65 	RF_FREELIST_CREATE(rf_callback_freelist, RF_MAX_FREE_CALLBACK,
     66 	    RF_CALLBACK_INC, sizeof(RF_CallbackDesc_t));
     67 	if (rf_callback_freelist == NULL)
     68 		return (ENOMEM);
     69 	rc = rf_ShutdownCreate(listp, rf_ShutdownCallback, NULL);
     70 	if (rc) {
     71 		RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__,
     72 		    __LINE__, rc);
     73 		rf_ShutdownCallback(NULL);
     74 		return (rc);
     75 	}
     76 	RF_FREELIST_PRIME(rf_callback_freelist, RF_CALLBACK_INITIAL, next,
     77 	    (RF_CallbackDesc_t *));
     78 	return (0);
     79 }
     80 
     81 RF_CallbackDesc_t *
     82 rf_AllocCallbackDesc()
     83 {
     84 	RF_CallbackDesc_t *p;
     85 
     86 	RF_FREELIST_GET(rf_callback_freelist, p, next, (RF_CallbackDesc_t *));
     87 	return (p);
     88 }
     89 
     90 void
     91 rf_FreeCallbackDesc(p)
     92 	RF_CallbackDesc_t *p;
     93 {
     94 	RF_FREELIST_FREE(rf_callback_freelist, p, next);
     95 }
     96